★ The only comprehensive real-time sales tax API

You're overpaying
when you shop online.
Stop it.

Use TaxHoliday to get the REAL tax rates for your zip code — including tax holiday information. Never overpay your sales tax again.

Get your free API key See how it works

Who We Are

Obsessed with
getting it right

The most up-to-date tax rate API available. We follow financial politics daily, update our database every hour, and call state departments with real humans to verify the most accurate tax information possible.

🔄

Updated Every Hour

Our database refreshes constantly so you always have current rates and holiday windows — not data from last quarter.

📞

Human Verification

We call state departments directly with real humans to confirm tax information — not just scrapers and guesswork.

🏖️

Every Tax Holiday Tracked

From Florida's back-to-school weekend to Texas's emergency prep holiday — all of them, with category rules and price limits.

⚡

One Call, All the Data

Pass a ZIP and a category — get the current tax rate, any active holiday, and whether your customer truly owes tax. In a single request.

Solutions

Everything you need to stop
leaving money on the table

Know when to showcase tax-free sales. Increase conversions. Give your customers a reason to buy right now.

ZIP API

🗺️

Full ZIP Code Tax API

State, county, city, and special district rates for any ZIP in the US. Know exactly what your customer owes before they check out — and show them savings when a holiday is live.

Tax Holidays

🎉

Tax Holiday Intelligence

Know when your customers can shop tax-free and showcase it to increase conversions. Dynamic JSON responses include all category rules, price limits, and jurisdiction details — cleanly structured.

Shopify

🛍️

Shopify Plugin

Automatically adjust tax rates and display tax holiday badges right at checkout. Let your customers know they're getting a tax-free deal — in your storefront, automatically.

Data Archiving

Proof when
you need it most

We archive all our data sources for later recoverability and proof to tax agencies when needed. Every data point is backed by a screenshot, saved HTML, and structured metadata.

📸

Screenshot archive

We screenshot the official government source page at the exact moment we collect data. Timestamped proof, always available.

🗄️

Saved HTML

The full page HTML is saved so the complete content can be re-verified or audited long after the original page changes.

📋

Structured metadata

Confidence scores, source type, timestamps, and AI reasoning — all included in every record returned by the API.

source high confidence 2026-08-01

📸 Archived government page screenshot

🖼️ TX_2026_backtoschool_001.png screenshot

📄 TX_2026_backtoschool_001.html source page

🔍 TX_2026_backtoschool_001.meta.json metadata

Why TaxHoliday.app

The only API built
specifically for tax holidays

	TaxHoliday.app	Avalara	TaxJar
Tax Rate API by ZIP & City	✓	✓	✓
Tax Holiday API with Source Documentation	✓	✗	✗
Historical Holiday Data for Bookkeeping	✓	✗	✗
Updated Every Hour	✓	✗	✗
Human-Verified Data	✓	✗	✗
Affordable Pricing	✓	✗	✗
Shopify Plugin with Automatic Holiday Badging	✓	✗	✗

Pricing

Start free, scale as you grow

No commitments. No credit card required to get started. Upgrade whenever you need more.

Free

$0 / month

150 requests / day

All query endpoints
All states
ZIP code lookup
HMAC-signed requests

Get started free

Start saving your customers money today

Join developers who trust TaxHoliday.app for the most accurate real-time tax data in the US. Free to start, no credit card required.

Get your free API key Read the docs

You're overpayingwhen you shop online.Stop it.

Start saving your customers money today

You're overpaying
when you shop online.
Stop it.